In phase measurement, the instrument used zero-crossing shaping circuit, zero-drift compensation circuit and software burr rejection technique. It has solved problems of dead-zone and filter circuits errors in phase measurement.

• 相位测量采用零交叉整形电路,零点补偿电路以及软件的毛刺剔除技术,解决了测相中的“死角”、“死区”、以及滤波电路所带来的误差。